Celery root is a frequent cause of food allergy in pollen-sensitized patients. Because of problems in blinding challenges with fresh vegetables and the risk of anaphylactic reactions, no double-blind, placebo-controlled, food challenges (DBPCFCs) with celery have been published so far. The aim of the study was to confirm the clinical relevance of celery as a food allergen by DBPCFCs and to evaluate current diagnostic procedures in patients with true allergy.This study confirms the importance of celery as a food allergen for use in DBPCFCs.- J Allergy Clin Immunol 2000 Aug;106(2):373-8 -- Celery allergy confirmed by double-blind, placebo-controlled food challenge: a clinical study in 32 subjects with a history of adverse reactions to celery root. -- Ballmer-Weber BK, Vieths S, Luttkopf D, Heuschmann P, Wuthrich B.